Php数组迭代失败 - Php array iteration fail

Php array iteration fail

本文关键字：失败迭代数组 Php | 更新日期: 2023-09-27

我有一个应用程序，我在MySql上保存工作日和营业时间如下:

0 10 22,1 10 22,2 10 22,4 10 22,5 10 22,6 10 22

php数组以以下格式从Mysql获取

Array ( [open_hours] => 0 10 22,1 10 22,2 10 22,4 10 22,5 10 22,6 10 22 )

0 10 22表示Monday 10am 22pm

我目前的代码似乎不太好，下面是我用来格式化日期和时间的代码

$openHrs = $businessMapper->getBusinessHours($business_id);
// return Array ( [open_hours] => 0 10 22,1 10 22,2 10 22,4 10 22,5 10 22,6 10 22 )
$openHrs = explode(",", $openHrs['open_hours']);
$weekdays = array('Sun','Mon','Tue','Wed','Thu','Fri','Sat');
        foreach($openHrs as &$temp) {
             //$temp = $weekdays[$temp[0]]
            $temp = explode(" ", $temp);
             //$temp = explode(" ", $temp);
            $temp[1] = $temp[1] > 12 ? $temp[1] - 12 . 'pm' : $temp[1] . 'am';
            $temp[2] = $temp[2] > 12 ? $temp[2] - 12 . 'pm' : $temp[2] . 'am';
            $temp = $weekdays[$temp[0]] . ' ' . $temp[1] . ' ' . $temp[2];
        }

但问题是，我只得到一个结果，这是Sat 10am 10pm。我如何修复我的代码?谢谢! !

问题:每次foreach迭代时，它都会重写前一个值，即$temp将只包含最后一个值。

解决方案:添加一个变量$res作为数组，并将每个值赋给它。

Try this:

$openHrs = $businessMapper->getBusinessHours($business_id);
// return Array ( [open_hours] => 0 10 22,1 10 22,2 10 22,4 10 22,5 10 22,6 10 22 )
$openHrs = explode(",", $openHrs['open_hours']);
$weekdays = array('Sun','Mon','Tue','Wed','Thu','Fri','Sat');
$res      = array();
        foreach($openHrs as &$temp) {
             //$temp = $weekdays[$temp[0]]
            $temp = explode(" ", $temp);
             //$temp = explode(" ", $temp);
            $temp[1] = $temp[1] > 12 ? $temp[1] - 12 . 'pm' : $temp[1] . 'am';
            $temp[2] = $temp[2] > 12 ? $temp[2] - 12 . 'pm' : $temp[2] . 'am';
            $res[]   = $weekdays[$temp[0]] . ' ' . $temp[1] . ' ' . $temp[2];
        }
echo "<pre>";
print_r($res);

foreach($openHrs as &$temp)

你不能在循环中使用$temp变量!

$openHrs = $businessMapper->getBusinessHours($business_id);
$openHrs = explode(",", $openHrs['open_hours']);
$weekdays = array('Sun','Mon','Tue','Wed','Thu','Fri','Sat');
$resultArray = array();
foreach($openHrs as $temp) {
   $tempRecord = explode(" ", $temp);
   if (count($tempRecord) == 3) {
       $timeBegin = $tempRecord[1] > 12 ? $tempRecord[1] - 12. 'pm' : $tempRecord[1]. 'am';
       $timeEnd = $tempRecord [2] > 12 ? $tempRecord[2] - 12. 'pm' : $tempRecord[2]. 'am';
       $resultArray[] = "{$weekdays[$temp[0]]} {$timeBegin} {$timeEnd}";
   }
}